<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>内边距</title>
  <style>
    div{
      width: 200px;
      height: 200px;
      border:1px solid red;
      padding-top: 50px;
      padding-left: 50px;
    }
  </style>
</head>
<body>
<div>内边距</div>
</body>
</html>